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Finding the Fourth Proportional to 28,245.78, 38,966.86 and 17,487.79

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Solution

The fourth proportional to 28,245.78, 38,966.86 and 17,487.79 is: 24,125.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,245.78 : 38,966.86 = 17,487.79 : x
  2. Step 2: Convert to fraction form
    28,245.78/38,966.86 = 17,487.79/x
  3. Step 3: Cross multiply
    28,245.78x = 38,966.86 × 17,487.79
  4. Step 4: Simplify right side
    28,245.78x = 681,444,264.64
  5. Step 5: Solve for x
    x = 681,444,264.64/28,245.78
  6. Step 6: Final answer
    x = 24,125.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.